Detachable lock



Aug. 1, 1928* C. A. CARPENTER DBTACHABLE LOCK F1196 Aug. 11, 1924 2 Sheets-Sheet 1 Patented Aug. 7, 1928.

UNITED STATES PATENT oFFI E- CHARLES AUGUSTUS CARPENTER, Of LONDON, vENGLAND.

DETACHABLE LOCK.

Application filed August 11, 1924, Serial No. 731,391, and in Great Britain August 24, 1923.

This invention relates to detachable locks, padlocks, portable locks and the like of the kind that are provided with looking devices adapted to engage an eye. staple or the like secured to the door, box, case or the like which is to be secured.

According to the present invention thedetachable lock comprises a casing having front and rear cover plates and an unbroken peripheral side wall disposed between said front and rear walls, the rear cover plate of the casing being provided with an opening in the body portion thereof within which an eye or staple is adapted to be inserted, locking mechanism comprising a rotatable gapped ring completely surrounded by the unbroken side wall of the casing, and a pin projecting from said gapped ring through a slot in the front cover plate of the casing for rotating the gapped ring. The lock may itself form part of, or be attached to a looking bar, or it may be formed integral with or attached to an angle plate.

Owing to this arrangement the use of a separate padlock is dispensed with. The studs which engage the keyhole slots in the usual plate which is fixed to the framework of the door are formed integral with the angle shaped locking plate and the casing which contains the locking mechanism may be curved or bevelled at the point where it joins the. angle plate. A slot is preferably provided as aforesaid at the back of the combined locking bar or angle plate and look through which the staple is inserted so as to be engaged by the locking mechanism.

The locking mechanism may be so arranged, or a stop may be provided, which prevents the key being withdrawn from the. lock until the locking bolt has been shot into the locked position. i

With the usual forms of angle plates employed with detachable locks of the aforesaid type, it is feasible, by inserting a thin hack saw between the angle late and the usual plate which is fixed to t e framework of the door and formed with keyhole slots, to saw through either the studs which are attached to the angle plate or the screws byin position extends over and covers one or" both edges of the permanently fixed locking plate. Owing to this arrangement it is im-. possible for a saw to be inserted between the contiguous edges of the locking plates or between the locking plate and the jamb or side of the door. I i At the present time the "eye or staple which is engagedby the. locking bar or angle plate is usually provided with a screw threaded stem which is passed through a hole in the door and. secured by a nut.

According to a further feature of the present invention, and with the object of strengthening the door around the staple and preventing the staple being wrenched from.

the door, the staple is attached to or formed In order that the said invention may be clearly understood and readily carried into effect the same will now be described more fully with reference to the accompanying drawings, in. which t Figure 1 is a perspective View of the usual. form of plate that is permanently attached -to one side of the framework of a. door and provided with keyhole shaped slots to re ceive the studs of a loose angle shaped locking plate. v i Figure 2 is aperspective view of an improved form of loose angle plate showing the studs which are adapted to be inserted in the slots in the plate shown at Figure l. Figure 3 is a perspective view of the usual form of eye or staple that is attached to the door and adapted to be inserted through the slot in the angle shaped locking plate shown at Figure 2. I

Figure 4 is a perspective view of an im proved form of eye or staple carried on a plate adapted to be attached to a door, and Figure 5 is a further perspective viewof the improved angle plate shown at Figure 2 and which is also adapted for use with the eye plate shown at Figure 4.

Figure 6 is a perspective View of a combined angle plate and lock and V Figure 7 is a rear view thereof showing the slot within which is accommodated the eye or staple shown either at Figure 3 or Figure 4.

Figure 8 is a perspective view of an improved form of combined lock and locking bar for use in cases where the ends of the bar are adapted to be accommodated in recessed plates (not shown) but which are of usual construction.

Figures 9 and 10 are perspective views oi improved forms of loose padlocks for use with the eye shown at Figure 3 or with the combined eye and plate shown at Figures 4 and 5.

Figure 11 is a plan View, with the cover plate removed,.of an improved form of combined lock and angle plate embodying certain features of the present invention, the parts being shown in the unlocked position.

Figure 12 is a View corresponding to Figure 11 showing the parts in the locked position.

Figure 13 is a section of the line 13*13 of Figure 12 and Figure 14 is a perspective view of the combined angle plate and lock with the cover plate in position.

Figure 15 is a detailed view of the cover plate.

A (Figure 1) is the usual plate which is permanently secured to the framework of the door and which is provided with two keyhole shaped slots at, a. B (Figures 2 and 5) is a loose angle plate provided with studs 6, b which are adapted to be inserted into the keyhole slots at, a so as detachahly to secure the angle plate B in position. C (Figure 3) is the usual form of eye or staple which is inserted through the door and secured in position by a bolt 0 and screw 0 the eye proper c projecting through the front of the door and being adapted to be inserted through the opening 12 in the plate shown at Figures 2 and 5 or into the opening 9 in the combined angle plate and lock shown at Figures 7 and 11 to 14. In order to prevent a thin hack saw being inserted between the angle plate B and the fixed plate A or behind the plate A, a flange or projecting edge 6 is provided. which, when the plate B is in position, projects over and covers both edges of the plate A.

Instead of using an eye or staple provided with a screw threaded stem as shown at Figure 3, a plate I), Figure 4, may be provided. which is secured to the front and side of the door by means of screws insorted through countersunk openings (Z, d. E (Figure 9) and F (Figure 10) are loose padlocks which can be employed with the angle plates and eyes shown at Figures 2, 3, 4 and I. The body portion of the padlock shown at Figure 9 is composed of a single casting provided with a cover plate 6 which is inserted within the body portion and rests upon a ledge or step at the top thereof, this ledge rendering it impossible for a'wedgc to be inserted between the cover plate 0 and the body portion of the lock to a sufiicient extent to allow leverage to be en'i iloycd in an attempt to force off the front plate a. In the case of the padlock shown at Figure 9 the rear face of the easing is provided with a slot similar to 9 (Figure which accommodates the eye 0 the internal locking mechanism being of the type shown at Figures 11 to 14. Figure 10' shows a padlock of the usual type but provided with a body portion F and rear cover plate F of the improved form shown at Figure 9. In the case of the combined looking bar and detachable lock shown at FigureS the locking mechanism is accommodated within a casing H formed integral or otherwise secured to the locking bar h, the internal mechanism of the lock being of the type shown at Figures 11 to 14h In the eX ample shown at Figure 8 the cross bar is adapted for use with a door which opens inwards, the slot in the rear face of the lock being located centrally of the bar.

The casing F shown at Figure 6 is formed integral with. the angle plate 7, the latter being formed with studs Z), 6. Thecover plate 6 is of similar construction to that shown Figure 9 and the locking mechanism is of similar construction to that shown at Figures 11 to 14L.

Referring to Figures 1.1 to 14 G is the body of the combined lock and angle plate, the casing g which accommodates the locking mcchanisn'i being formed integral with the flanged part 7 to which are attached the studs Z), L. In this instance the combined lock and. angle plate is also formed with a flangc 71 which projects over both edges oi the socket plate, such as A. (Figure 1) within which the studs 6. bare adapted to engage. II is the rotatable ring formed with a gapped portion it and g is the opening in the rear face of the cast ng through which the staple eye adapted to be inserted. h is the stout pin which is termed integral with the casting and around which the ring II is adapted to be rotated. An arcuate portion h of the pin is cut away as shown so as to accommodate the thickness of the staple. The r ng H is formed with an upstanding pin k which passes through the cover plate It and. enters into one of a pair of hollow studs li 75 carried hya rotatable plate 71." which is pivotally mounted on a stud it connected to the cover plate t of the casing. The ring H s also formed with a projecting part/i wl .ch abuts against the shield I on the locking bolt 2', when the locking bolt has. been actuated. The casing is formed with two inwardly projecting bosses 72- 71. between which the locking bolt 2' is adapted to pass in moving into the gapped portion h of the ill? Hill

ill]

ring H. 71 i are the tumblers or levers of the lock which pivot about a pin 2' projecting from the rear face of the casting G, the tumblers or levers bearing at their front end against a pin 2 projecting from the locking bolt 2'. The shield I which is formed integral with the locking bolt 11 serves also to cover an arcuate slot I12 in the plate h in around which slot the pin k moves when the gapped ring H is rotated by means of the plate 72 The cover plate is provided with depending internally screw threaded projections 70 which enter recesses 70 in the casting G, the cover plate being secured in place by screws, rivets, studs or any other suitable fastening device, inserted through the rear face of the casting and engaging within the projections 70. The casting G is also formed with a stepped portion In within which the cover plate It is seated. Owing to this arrangement it is impossible for an instrument to be inserted between the cover plate and the body portion G of the casting to an extent sufiicient to obtain such leverage as would be necessary to wrench off the cover plate It. In the example shown at Figures 11 to 14, the cover plate is formed with a hollow projecting part 70 which receives the front end of the staple, this arrangement reducing the overall thickness of the lock. In Figures 6, 8 and 9, however, an alternative arrangement is shown in which the casing is itself sufiiciently thick to accommodate the staple, the provision of a dome shaped part on the cover plate being in these instances dispensed with. h is a pin which accommodates the key, the part h of the casting contiguous to the key being shaped as shown so that the key can only be withdrawn when the locking bolt has been advanced into the gap h in the ring H.

WVhat I claim and desire to secure by Letters Patent of the United States is 1. A detachable lock comprising acasing having a curved slot formed in one wall, a rotatable ring within the casing, a pin projecting from the ring through the curved slot in the casing and adapted to rotate the ring, and means for covering the curved slot when the parts are in locked position.

2. A detachable lock comprising a casing having front and rear cover plates and an unbroken peripheral side wall disposed be-.

tween said front and rear walls, the rear cover plate of the casing being provided with an opening in thebody portion thereof within which an eye or staple is adapted to' casing, and a pin projecting'from saidgapped ring through a slot in the front cover tween said front and rear walls, the rear cover plate of the casing being provided with an opening in the body portion thereof within which an eye or staple is adapted to be inserted, locking mechanism comprising a rotatable gapped ring completely surrounded by the unbroken side wall of the casing, a pin projecting from said ring through a slot in the front cover plate of the casing for rotating the gapped ring, and a pin extending transversely of the casing and having a recess of suflicient size to accommodate the eye or staple to which the lock'is to be secured.

4., A detachable lock comprising a casing having front and rear cover plates and an unbroken peripheral side wall disposed between said front and rear walls, the rear cover plate of the casing being provided with an opening in the body'portion thereof within which an eye or staple is adapted to be inserted, locking mechanism comprising a rotatable gapped ring completely surrounded by the unbroken sidewall of the casing,

a pin projecting from said ring through atransversely of the casing and having a recess of suflicient size to accommodate the eye or staple to which the lock is to be secured, and means attached to said casing and adapted detachably to engage with sockets on the framework of a door.

5. A detachable lock comprising a casing having front and rear cover plates and an unbroken peripheral side wall disposed between said front and rear walls, the rear cover plate of thecasing being provided with an opening in the body portion thereof within which an eye or staple is adapted to be inserted, locking mechanism comprising a rotatable gapped ring completely surrounded by the unbroken side wall of the casing, a pin projecting fromsaid ring through a slot in the front cover plate of the casing, and means engaging said pin and located externally of the front cover plate for rotating the gapped ring.

6. A detachable locking device as claimed I in claim 8, wherein the locking mechanism comprises a locking bolt, a rotatable gapped ring, and a plate attached to the locking bolt, said plate when the bolt is actuated being adapted to move between. the outer cover of the casing and the rotatable ring for the purpose specified. CHARLES AUGUSTUS CARPENTER. 

